[gtk+] GtkMenuTracker: add 'special' items

[Ryan Lortie <desrt src gnome org>]

commit ea0ede201e1bea1ab16be414e48bb1b902c4d56a
Author: Ryan Lortie <desrt desrt ca>
Date:   Sat Dec 14 21:56:26 2013 -0500

    GtkMenuTracker: add 'special' items
    
    Allow the possibility for items to be marked with a special attribute and
    expose this via GtkTrackerMenuItem.  For internal use only.
    
    We will use this to implement the special 'Hide', 'Hide Others' and 'Show All'
    items and the 'Services' submenu in the Mac OS application menu.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=720552

 gtk/gtkmenutrackeritem.c |   10 ++++++++++
 gtk/gtkmenutrackeritem.h |    2 ++
 2 files changed, 12 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkmenutrackeritem.c b/gtk/gtkmenutrackeritem.c
index bb9a1f4..ddcbc0b 100644
--- a/gtk/gtkmenutrackeritem.c
+++ b/gtk/gtkmenutrackeritem.c
@@ -653,6 +653,16 @@ gtk_menu_tracker_item_get_accel (GtkMenuTrackerItem *self)
   return gtk_action_muxer_get_primary_accel (GTK_ACTION_MUXER (self->observable), self->action_and_target);
 }
 
+const gchar *
+gtk_menu_tracker_item_get_special (GtkMenuTrackerItem *self)
+{
+  const gchar *special = NULL;
+
+  g_menu_item_get_attribute (self->item, "x-gtk-private-special", "&s", &special);
+
+  return special;
+}
+
 GMenuModel *
 _gtk_menu_tracker_item_get_submenu (GtkMenuTrackerItem *self)
 {
diff --git a/gtk/gtkmenutrackeritem.h b/gtk/gtkmenutrackeritem.h
index 03709d6..2d9ff16 100644
--- a/gtk/gtkmenutrackeritem.h
+++ b/gtk/gtkmenutrackeritem.h
@@ -48,6 +48,8 @@ GtkMenuTrackerItem *   _gtk_menu_tracker_item_new                       (GtkActi
                                                                          const gchar         
*action_namespace,
                                                                          gboolean             is_separator);
 
+const gchar *           gtk_menu_tracker_item_get_special               (GtkMenuTrackerItem *self);
+
 GtkActionObservable *  _gtk_menu_tracker_item_get_observable            (GtkMenuTrackerItem *self);
 
 gboolean                gtk_menu_tracker_item_get_is_separator          (GtkMenuTrackerItem *self);